./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:52:12,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:52:12,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:52:12,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:52:12,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:52:12,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:52:12,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:52:12,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:52:12,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:52:12,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:52:12,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:52:12,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:52:12,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:52:12,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:52:12,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:52:12,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:52:12,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:52:12,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:52:12,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:52:12,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:52:12,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:52:12,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:52:12,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:52:12,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:52:12,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:52:12,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:52:12,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:52:12,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:52:12,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:52:12,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:52:12,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:52:12,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:52:12,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:52:12,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:52:12,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:52:12,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:52:12,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:52:12,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:52:12,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:52:12,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:52:12,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:52:12,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:52:12,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:52:12,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:52:12,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:52:12,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:52:12,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:52:12,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:52:12,494 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:52:12,495 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:52:12,495 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:52:12,495 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:52:12,495 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:52:12,495 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:52:12,495 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:52:12,496 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:52:12,496 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:52:12,496 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:52:12,496 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:52:12,496 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:52:12,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:52:12,497 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:52:12,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:52:12,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:52:12,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:52:12,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:52:12,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:52:12,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:52:12,498 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:52:12,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:52:12,498 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:52:12,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:52:12,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:52:12,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:52:12,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:52:12,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:52:12,499 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:52:12,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:52:12,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:52:12,500 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:52:12,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:52:12,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:52:12,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:52:12,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 256d604ca5845ed70fae4c0c59880096896900821991ad09252cbc35739a584c [2022-12-14 10:52:12,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:52:12,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:52:12,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:52:12,729 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:52:12,729 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:52:12,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2022-12-14 10:52:15,390 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:52:15,633 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:52:15,634 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2022-12-14 10:52:15,649 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/data/d21701e34/03bf67a2d32849c998c26364bf031bee/FLAGfe19b73e6 [2022-12-14 10:52:15,661 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/data/d21701e34/03bf67a2d32849c998c26364bf031bee [2022-12-14 10:52:15,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:52:15,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:52:15,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:52:15,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:52:15,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:52:15,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:52:15" (1/1) ... [2022-12-14 10:52:15,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38daf43d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:15, skipping insertion in model container [2022-12-14 10:52:15,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:52:15" (1/1) ... [2022-12-14 10:52:15,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:52:15,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:52:16,065 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2022-12-14 10:52:16,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:52:16,150 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:52:16,188 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c[40079,40092] [2022-12-14 10:52:16,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:52:16,230 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:52:16,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16 WrapperNode [2022-12-14 10:52:16,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:52:16,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:52:16,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:52:16,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:52:16,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,303 INFO L138 Inliner]: procedures = 99, calls = 355, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 981 [2022-12-14 10:52:16,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:52:16,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:52:16,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:52:16,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:52:16,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,337 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:52:16,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:52:16,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:52:16,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:52:16,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (1/1) ... [2022-12-14 10:52:16,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:52:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:16,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:52:16,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:52:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 10:52:16,411 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 10:52:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 10:52:16,411 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 10:52:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 10:52:16,411 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 10:52:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 10:52:16,411 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 10:52:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 10:52:16,411 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 10:52:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 10:52:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 10:52:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 10:52:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 10:52:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 10:52:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 10:52:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 10:52:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 10:52:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 10:52:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 10:52:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 10:52:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 10:52:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:52:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 10:52:16,413 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-12-14 10:52:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 10:52:16,413 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 10:52:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 10:52:16,413 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 10:52:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 10:52:16,413 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 10:52:16,413 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 10:52:16,414 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 10:52:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 10:52:16,414 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 10:52:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 10:52:16,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 10:52:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 10:52:16,414 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 10:52:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 10:52:16,414 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 10:52:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 10:52:16,414 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 10:52:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 10:52:16,415 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 10:52:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 10:52:16,415 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 10:52:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 10:52:16,415 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 10:52:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:52:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 10:52:16,415 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 10:52:16,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:52:16,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:52:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 10:52:16,416 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 10:52:16,416 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 10:52:16,416 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 10:52:16,536 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:52:16,538 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:52:17,309 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:52:17,903 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:52:17,903 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 10:52:17,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:52:17 BoogieIcfgContainer [2022-12-14 10:52:17,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:52:17,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:52:17,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:52:17,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:52:17,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:52:15" (1/3) ... [2022-12-14 10:52:17,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222850cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:52:17, skipping insertion in model container [2022-12-14 10:52:17,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:52:16" (2/3) ... [2022-12-14 10:52:17,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222850cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:52:17, skipping insertion in model container [2022-12-14 10:52:17,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:52:17" (3/3) ... [2022-12-14 10:52:17,913 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2022-12-14 10:52:17,928 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:52:17,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:52:17,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:52:18,000 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@62b1d60a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:52:18,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:52:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2022-12-14 10:52:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 10:52:18,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:18,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:18,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:18,026 INFO L85 PathProgramCache]: Analyzing trace with hash -788683569, now seen corresponding path program 1 times [2022-12-14 10:52:18,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:18,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752505737] [2022-12-14 10:52:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:18,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:18,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752505737] [2022-12-14 10:52:18,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752505737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:18,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:18,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:52:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516145115] [2022-12-14 10:52:18,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:18,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 10:52:18,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 10:52:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:52:18,410 INFO L87 Difference]: Start difference. First operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 10:52:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:18,546 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2022-12-14 10:52:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 10:52:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-12-14 10:52:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:18,559 INFO L225 Difference]: With dead ends: 424 [2022-12-14 10:52:18,559 INFO L226 Difference]: Without dead ends: 402 [2022-12-14 10:52:18,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:52:18,564 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:18,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 593 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:52:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-12-14 10:52:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-12-14 10:52:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 270 states have (on average 1.5629629629629629) internal successors, (422), 291 states have internal predecessors, (422), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-12-14 10:52:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2022-12-14 10:52:18,617 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2022-12-14 10:52:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:18,618 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2022-12-14 10:52:18,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 10:52:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2022-12-14 10:52:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:52:18,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:18,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:18,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:52:18,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:18,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1547639527, now seen corresponding path program 1 times [2022-12-14 10:52:18,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:18,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502126736] [2022-12-14 10:52:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:18,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:18,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:18,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502126736] [2022-12-14 10:52:18,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502126736] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:18,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:18,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:52:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386445509] [2022-12-14 10:52:18,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:18,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:52:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:52:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:18,942 INFO L87 Difference]: Start difference. First operand 402 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 10:52:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:20,493 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2022-12-14 10:52:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:52:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-12-14 10:52:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:20,502 INFO L225 Difference]: With dead ends: 1312 [2022-12-14 10:52:20,502 INFO L226 Difference]: Without dead ends: 926 [2022-12-14 10:52:20,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:52:20,507 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1288 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:20,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 1119 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:52:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-12-14 10:52:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2022-12-14 10:52:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 586 states have (on average 1.5853242320819112) internal successors, (929), 616 states have internal predecessors, (929), 204 states have call successors, (204), 47 states have call predecessors, (204), 48 states have return successors, (206), 188 states have call predecessors, (206), 199 states have call successors, (206) [2022-12-14 10:52:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2022-12-14 10:52:20,590 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2022-12-14 10:52:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:20,590 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2022-12-14 10:52:20,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 10:52:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2022-12-14 10:52:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 10:52:20,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:20,602 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:20,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:52:20,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:20,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1426151549, now seen corresponding path program 1 times [2022-12-14 10:52:20,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:20,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842546320] [2022-12-14 10:52:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:20,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:52:20,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:20,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842546320] [2022-12-14 10:52:20,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842546320] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:20,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:20,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:52:20,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585301735] [2022-12-14 10:52:20,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:20,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:52:20,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:20,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:52:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:52:20,948 INFO L87 Difference]: Start difference. First operand 839 states and 1339 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:52:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:22,548 INFO L93 Difference]: Finished difference Result 2617 states and 4223 transitions. [2022-12-14 10:52:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:52:22,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-12-14 10:52:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:22,556 INFO L225 Difference]: With dead ends: 2617 [2022-12-14 10:52:22,557 INFO L226 Difference]: Without dead ends: 1795 [2022-12-14 10:52:22,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:52:22,561 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1222 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2722 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:22,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 1663 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2722 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:52:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-12-14 10:52:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1708. [2022-12-14 10:52:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1203 states have (on average 1.5901911886949294) internal successors, (1913), 1259 states have internal predecessors, (1913), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2022-12-14 10:52:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2752 transitions. [2022-12-14 10:52:22,641 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2752 transitions. Word has length 88 [2022-12-14 10:52:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:22,641 INFO L495 AbstractCegarLoop]: Abstraction has 1708 states and 2752 transitions. [2022-12-14 10:52:22,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 10:52:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2752 transitions. [2022-12-14 10:52:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 10:52:22,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:22,643 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:22,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:52:22,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:22,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1374359642, now seen corresponding path program 1 times [2022-12-14 10:52:22,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:22,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211044466] [2022-12-14 10:52:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:22,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:52:22,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:22,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211044466] [2022-12-14 10:52:22,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211044466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:22,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:22,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:52:22,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149519894] [2022-12-14 10:52:22,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:22,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:52:22,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:52:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:52:22,878 INFO L87 Difference]: Start difference. First operand 1708 states and 2752 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 10:52:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:23,496 INFO L93 Difference]: Finished difference Result 1807 states and 2914 transitions. [2022-12-14 10:52:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:52:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-12-14 10:52:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:23,508 INFO L225 Difference]: With dead ends: 1807 [2022-12-14 10:52:23,509 INFO L226 Difference]: Without dead ends: 1792 [2022-12-14 10:52:23,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:52:23,512 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 721 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:23,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1940 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:52:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2022-12-14 10:52:23,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1714. [2022-12-14 10:52:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1209 states have (on average 1.587262200165426) internal successors, (1919), 1265 states have internal predecessors, (1919), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2022-12-14 10:52:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2758 transitions. [2022-12-14 10:52:23,643 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2758 transitions. Word has length 92 [2022-12-14 10:52:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:23,644 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2758 transitions. [2022-12-14 10:52:23,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 10:52:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2758 transitions. [2022-12-14 10:52:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 10:52:23,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:23,648 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:23,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:52:23,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1564622102, now seen corresponding path program 1 times [2022-12-14 10:52:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:23,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392014553] [2022-12-14 10:52:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:23,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:52:23,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:23,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392014553] [2022-12-14 10:52:23,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392014553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:23,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:23,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 10:52:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082205299] [2022-12-14 10:52:23,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:23,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:52:23,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:23,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:52:23,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:52:23,944 INFO L87 Difference]: Start difference. First operand 1714 states and 2758 transitions. Second operand has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 10:52:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:26,294 INFO L93 Difference]: Finished difference Result 4333 states and 6955 transitions. [2022-12-14 10:52:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 10:52:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2022-12-14 10:52:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:26,303 INFO L225 Difference]: With dead ends: 4333 [2022-12-14 10:52:26,304 INFO L226 Difference]: Without dead ends: 2635 [2022-12-14 10:52:26,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:52:26,310 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 1059 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 5332 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 5755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 5332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:26,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 2832 Invalid, 5755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 5332 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 10:52:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-12-14 10:52:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2552. [2022-12-14 10:52:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 1783 states have (on average 1.5709478407178912) internal successors, (2801), 1861 states have internal predecessors, (2801), 612 states have call successors, (612), 137 states have call predecessors, (612), 156 states have return successors, (657), 586 states have call predecessors, (657), 607 states have call successors, (657) [2022-12-14 10:52:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4070 transitions. [2022-12-14 10:52:26,427 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4070 transitions. Word has length 96 [2022-12-14 10:52:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:26,427 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 4070 transitions. [2022-12-14 10:52:26,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 10:52:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4070 transitions. [2022-12-14 10:52:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 10:52:26,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:26,430 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:26,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:52:26,430 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -29377582, now seen corresponding path program 1 times [2022-12-14 10:52:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:26,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257147222] [2022-12-14 10:52:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:52:26,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:26,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257147222] [2022-12-14 10:52:26,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257147222] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:26,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:26,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:52:26,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728165431] [2022-12-14 10:52:26,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:26,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:52:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:52:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:52:26,732 INFO L87 Difference]: Start difference. First operand 2552 states and 4070 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 10:52:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:27,305 INFO L93 Difference]: Finished difference Result 2697 states and 4275 transitions. [2022-12-14 10:52:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:52:27,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-12-14 10:52:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:27,315 INFO L225 Difference]: With dead ends: 2697 [2022-12-14 10:52:27,316 INFO L226 Difference]: Without dead ends: 2682 [2022-12-14 10:52:27,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:52:27,317 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 654 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:27,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 2891 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:52:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2022-12-14 10:52:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2628. [2022-12-14 10:52:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 1835 states have (on average 1.5634877384196186) internal successors, (2869), 1913 states have internal predecessors, (2869), 628 states have call successors, (628), 145 states have call predecessors, (628), 164 states have return successors, (683), 602 states have call predecessors, (683), 623 states have call successors, (683) [2022-12-14 10:52:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 4180 transitions. [2022-12-14 10:52:27,440 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 4180 transitions. Word has length 97 [2022-12-14 10:52:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:27,441 INFO L495 AbstractCegarLoop]: Abstraction has 2628 states and 4180 transitions. [2022-12-14 10:52:27,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 10:52:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 4180 transitions. [2022-12-14 10:52:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 10:52:27,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:27,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:27,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:52:27,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:27,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1515486588, now seen corresponding path program 1 times [2022-12-14 10:52:27,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:27,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135770491] [2022-12-14 10:52:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:52:27,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:27,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135770491] [2022-12-14 10:52:27,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135770491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:27,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:27,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:52:27,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030532728] [2022-12-14 10:52:27,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:27,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:27,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:27,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:27,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:52:27,607 INFO L87 Difference]: Start difference. First operand 2628 states and 4180 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:28,701 INFO L93 Difference]: Finished difference Result 7108 states and 11509 transitions. [2022-12-14 10:52:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:52:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2022-12-14 10:52:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:28,716 INFO L225 Difference]: With dead ends: 7108 [2022-12-14 10:52:28,716 INFO L226 Difference]: Without dead ends: 4496 [2022-12-14 10:52:28,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:52:28,725 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1232 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:28,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 730 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:52:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2022-12-14 10:52:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 4133. [2022-12-14 10:52:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 2891 states have (on average 1.5569007263922519) internal successors, (4501), 3021 states have internal predecessors, (4501), 976 states have call successors, (976), 221 states have call predecessors, (976), 265 states have return successors, (1132), 935 states have call predecessors, (1132), 971 states have call successors, (1132) [2022-12-14 10:52:28,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 6609 transitions. [2022-12-14 10:52:28,975 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 6609 transitions. Word has length 104 [2022-12-14 10:52:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:28,975 INFO L495 AbstractCegarLoop]: Abstraction has 4133 states and 6609 transitions. [2022-12-14 10:52:28,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 6609 transitions. [2022-12-14 10:52:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 10:52:28,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:28,978 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:28,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:52:28,978 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash -264848079, now seen corresponding path program 1 times [2022-12-14 10:52:28,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:28,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871963059] [2022-12-14 10:52:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:28,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:52:29,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:29,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871963059] [2022-12-14 10:52:29,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871963059] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:29,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:29,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:52:29,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145361423] [2022-12-14 10:52:29,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:29,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:29,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:52:29,123 INFO L87 Difference]: Start difference. First operand 4133 states and 6609 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:30,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:30,528 INFO L93 Difference]: Finished difference Result 11577 states and 19028 transitions. [2022-12-14 10:52:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:52:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2022-12-14 10:52:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:30,553 INFO L225 Difference]: With dead ends: 11577 [2022-12-14 10:52:30,553 INFO L226 Difference]: Without dead ends: 7463 [2022-12-14 10:52:30,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:52:30,567 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1219 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:30,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 742 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 10:52:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7463 states. [2022-12-14 10:52:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7463 to 6992. [2022-12-14 10:52:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6992 states, 4900 states have (on average 1.553265306122449) internal successors, (7611), 5148 states have internal predecessors, (7611), 1622 states have call successors, (1622), 373 states have call predecessors, (1622), 469 states have return successors, (2084), 1545 states have call predecessors, (2084), 1617 states have call successors, (2084) [2022-12-14 10:52:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6992 states to 6992 states and 11317 transitions. [2022-12-14 10:52:31,020 INFO L78 Accepts]: Start accepts. Automaton has 6992 states and 11317 transitions. Word has length 105 [2022-12-14 10:52:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:31,020 INFO L495 AbstractCegarLoop]: Abstraction has 6992 states and 11317 transitions. [2022-12-14 10:52:31,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6992 states and 11317 transitions. [2022-12-14 10:52:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 10:52:31,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:31,022 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:31,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:52:31,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash 379355998, now seen corresponding path program 1 times [2022-12-14 10:52:31,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:31,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761037629] [2022-12-14 10:52:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:52:31,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:31,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761037629] [2022-12-14 10:52:31,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761037629] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:31,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:31,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:52:31,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223848034] [2022-12-14 10:52:31,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:31,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:31,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:52:31,162 INFO L87 Difference]: Start difference. First operand 6992 states and 11317 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:32,855 INFO L93 Difference]: Finished difference Result 20336 states and 34435 transitions. [2022-12-14 10:52:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:52:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2022-12-14 10:52:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:32,910 INFO L225 Difference]: With dead ends: 20336 [2022-12-14 10:52:32,910 INFO L226 Difference]: Without dead ends: 13369 [2022-12-14 10:52:32,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:52:32,938 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1206 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:32,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 754 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:52:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13369 states. [2022-12-14 10:52:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13369 to 12653. [2022-12-14 10:52:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12653 states, 8867 states have (on average 1.547874140069922) internal successors, (13725), 9367 states have internal predecessors, (13725), 2892 states have call successors, (2892), 677 states have call predecessors, (2892), 893 states have return successors, (4350), 2743 states have call predecessors, (4350), 2887 states have call successors, (4350) [2022-12-14 10:52:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12653 states to 12653 states and 20967 transitions. [2022-12-14 10:52:33,706 INFO L78 Accepts]: Start accepts. Automaton has 12653 states and 20967 transitions. Word has length 106 [2022-12-14 10:52:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:33,706 INFO L495 AbstractCegarLoop]: Abstraction has 12653 states and 20967 transitions. [2022-12-14 10:52:33,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 12653 states and 20967 transitions. [2022-12-14 10:52:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 10:52:33,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:33,709 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:33,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:52:33,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:33,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1125150189, now seen corresponding path program 1 times [2022-12-14 10:52:33,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:33,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407137572] [2022-12-14 10:52:33,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:33,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:52:33,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:33,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407137572] [2022-12-14 10:52:33,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407137572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:33,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:33,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:52:33,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812296499] [2022-12-14 10:52:33,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:33,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:33,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:52:33,851 INFO L87 Difference]: Start difference. First operand 12653 states and 20967 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:36,473 INFO L93 Difference]: Finished difference Result 37693 states and 67262 transitions. [2022-12-14 10:52:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:52:36,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2022-12-14 10:52:36,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:36,570 INFO L225 Difference]: With dead ends: 37693 [2022-12-14 10:52:36,570 INFO L226 Difference]: Without dead ends: 25077 [2022-12-14 10:52:36,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:52:36,609 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1193 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:36,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 763 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:52:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25077 states. [2022-12-14 10:52:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25077 to 23842. [2022-12-14 10:52:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23842 states, 16686 states have (on average 1.541112309720724) internal successors, (25715), 17722 states have internal predecessors, (25715), 5382 states have call successors, (5382), 1285 states have call predecessors, (5382), 1773 states have return successors, (10128), 5089 states have call predecessors, (10128), 5377 states have call successors, (10128) [2022-12-14 10:52:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 41225 transitions. [2022-12-14 10:52:38,427 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 41225 transitions. Word has length 107 [2022-12-14 10:52:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:38,428 INFO L495 AbstractCegarLoop]: Abstraction has 23842 states and 41225 transitions. [2022-12-14 10:52:38,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 41225 transitions. [2022-12-14 10:52:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 10:52:38,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:38,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:38,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 10:52:38,430 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:38,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash -520197824, now seen corresponding path program 1 times [2022-12-14 10:52:38,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:38,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277397432] [2022-12-14 10:52:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:38,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:52:38,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:38,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277397432] [2022-12-14 10:52:38,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277397432] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:38,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:38,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:52:38,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021692927] [2022-12-14 10:52:38,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:38,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:38,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:38,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:52:38,570 INFO L87 Difference]: Start difference. First operand 23842 states and 41225 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:42,744 INFO L93 Difference]: Finished difference Result 72195 states and 140634 transitions. [2022-12-14 10:52:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:52:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-12-14 10:52:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:42,966 INFO L225 Difference]: With dead ends: 72195 [2022-12-14 10:52:42,967 INFO L226 Difference]: Without dead ends: 48404 [2022-12-14 10:52:43,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:52:43,056 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1203 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:43,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 754 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:52:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48404 states. [2022-12-14 10:52:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48404 to 45811. [2022-12-14 10:52:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45811 states, 32099 states have (on average 1.5378983768964765) internal successors, (49365), 34143 states have internal predecessors, (49365), 10249 states have call successors, (10249), 2493 states have call predecessors, (10249), 3462 states have return successors, (24345), 9669 states have call predecessors, (24345), 10244 states have call successors, (24345) [2022-12-14 10:52:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45811 states to 45811 states and 83959 transitions. [2022-12-14 10:52:47,043 INFO L78 Accepts]: Start accepts. Automaton has 45811 states and 83959 transitions. Word has length 108 [2022-12-14 10:52:47,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:47,044 INFO L495 AbstractCegarLoop]: Abstraction has 45811 states and 83959 transitions. [2022-12-14 10:52:47,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-12-14 10:52:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 45811 states and 83959 transitions. [2022-12-14 10:52:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 10:52:47,050 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:47,050 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:47,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:52:47,050 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1264189289, now seen corresponding path program 1 times [2022-12-14 10:52:47,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:47,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446121351] [2022-12-14 10:52:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 10:52:47,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:47,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446121351] [2022-12-14 10:52:47,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446121351] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:47,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:47,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:52:47,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946881819] [2022-12-14 10:52:47,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:47,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:47,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:52:47,187 INFO L87 Difference]: Start difference. First operand 45811 states and 83959 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 10:52:50,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:50,174 INFO L93 Difference]: Finished difference Result 93222 states and 179450 transitions. [2022-12-14 10:52:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:52:50,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2022-12-14 10:52:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:50,397 INFO L225 Difference]: With dead ends: 93222 [2022-12-14 10:52:50,397 INFO L226 Difference]: Without dead ends: 47428 [2022-12-14 10:52:50,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:52:50,619 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 30 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:50,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1759 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:52:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47428 states. [2022-12-14 10:52:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47428 to 46009. [2022-12-14 10:52:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46009 states, 32297 states have (on average 1.534600736910549) internal successors, (49563), 34341 states have internal predecessors, (49563), 10249 states have call successors, (10249), 2493 states have call predecessors, (10249), 3462 states have return successors, (24345), 9669 states have call predecessors, (24345), 10244 states have call successors, (24345) [2022-12-14 10:52:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46009 states to 46009 states and 84157 transitions. [2022-12-14 10:52:54,395 INFO L78 Accepts]: Start accepts. Automaton has 46009 states and 84157 transitions. Word has length 156 [2022-12-14 10:52:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:54,395 INFO L495 AbstractCegarLoop]: Abstraction has 46009 states and 84157 transitions. [2022-12-14 10:52:54,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 10:52:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 46009 states and 84157 transitions. [2022-12-14 10:52:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 10:52:54,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:54,402 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:52:54,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 10:52:54,402 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:52:54,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:54,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1705753293, now seen corresponding path program 1 times [2022-12-14 10:52:54,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:52:54,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755405180] [2022-12-14 10:52:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:54,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:52:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 10:52:54,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:52:54,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755405180] [2022-12-14 10:52:54,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755405180] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:52:54,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057093443] [2022-12-14 10:52:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:54,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:54,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:54,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:52:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 2125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:52:54,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 10:52:55,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:55,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057093443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:55,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:52:55,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 10:52:55,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683225180] [2022-12-14 10:52:55,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:55,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:55,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:52:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:55,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:52:55,008 INFO L87 Difference]: Start difference. First operand 46009 states and 84157 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:52:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:58,079 INFO L93 Difference]: Finished difference Result 94575 states and 182849 transitions. [2022-12-14 10:52:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:52:58,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 163 [2022-12-14 10:52:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:58,325 INFO L225 Difference]: With dead ends: 94575 [2022-12-14 10:52:58,325 INFO L226 Difference]: Without dead ends: 48583 [2022-12-14 10:52:58,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:52:58,506 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 213 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:58,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1548 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:52:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48583 states. [2022-12-14 10:53:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48583 to 48583. [2022-12-14 10:53:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48583 states, 34805 states have (on average 1.5624479241488292) internal successors, (54381), 36849 states have internal predecessors, (54381), 10249 states have call successors, (10249), 2559 states have call predecessors, (10249), 3528 states have return successors, (24345), 9669 states have call predecessors, (24345), 10244 states have call successors, (24345) [2022-12-14 10:53:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48583 states to 48583 states and 88975 transitions. [2022-12-14 10:53:02,239 INFO L78 Accepts]: Start accepts. Automaton has 48583 states and 88975 transitions. Word has length 163 [2022-12-14 10:53:02,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:02,239 INFO L495 AbstractCegarLoop]: Abstraction has 48583 states and 88975 transitions. [2022-12-14 10:53:02,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:53:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 48583 states and 88975 transitions. [2022-12-14 10:53:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 10:53:02,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:02,246 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:02,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:53:02,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 10:53:02,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1582550101, now seen corresponding path program 1 times [2022-12-14 10:53:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:02,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023026779] [2022-12-14 10:53:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:02,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 10:53:02,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:02,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023026779] [2022-12-14 10:53:02,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023026779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:53:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166645708] [2022-12-14 10:53:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:02,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:02,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:53:02,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:53:02,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:53:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 2130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:53:02,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 10:53:02,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:02,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166645708] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:02,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:53:02,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 10:53:02,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935829477] [2022-12-14 10:53:02,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:02,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:53:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:53:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:53:02,902 INFO L87 Difference]: Start difference. First operand 48583 states and 88975 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:53:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:06,241 INFO L93 Difference]: Finished difference Result 99723 states and 192287 transitions. [2022-12-14 10:53:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:53:06,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 168 [2022-12-14 10:53:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:06,441 INFO L225 Difference]: With dead ends: 99723 [2022-12-14 10:53:06,442 INFO L226 Difference]: Without dead ends: 51157 [2022-12-14 10:53:06,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:53:06,606 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 211 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:06,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1548 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:53:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51157 states. [2022-12-14 10:53:09,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51157 to 51157. [2022-12-14 10:53:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51157 states, 37313 states have (on average 1.5865516039986063) internal successors, (59199), 39357 states have internal predecessors, (59199), 10249 states have call successors, (10249), 2625 states have call predecessors, (10249), 3594 states have return successors, (24345), 9669 states have call predecessors, (24345), 10244 states have call successors, (24345) [2022-12-14 10:53:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51157 states to 51157 states and 93793 transitions. [2022-12-14 10:53:09,924 INFO L78 Accepts]: Start accepts. Automaton has 51157 states and 93793 transitions. Word has length 168 [2022-12-14 10:53:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:09,925 INFO L495 AbstractCegarLoop]: Abstraction has 51157 states and 93793 transitions. [2022-12-14 10:53:09,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:53:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 51157 states and 93793 transitions. [2022-12-14 10:53:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 10:53:09,931 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:09,931 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:09,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:53:10,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:10,133 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:10,134 INFO L85 PathProgramCache]: Analyzing trace with hash -47552677, now seen corresponding path program 1 times [2022-12-14 10:53:10,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:10,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44188615] [2022-12-14 10:53:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:10,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 10:53:10,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:10,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44188615] [2022-12-14 10:53:10,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44188615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:53:10,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135856266] [2022-12-14 10:53:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:10,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:53:10,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:53:10,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:53:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:10,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 2134 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:53:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 10:53:10,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:10,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135856266] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:10,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:53:10,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 10:53:10,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043671299] [2022-12-14 10:53:10,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:10,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:53:10,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:53:10,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:53:10,632 INFO L87 Difference]: Start difference. First operand 51157 states and 93793 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:53:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:14,065 INFO L93 Difference]: Finished difference Result 104871 states and 201725 transitions. [2022-12-14 10:53:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:53:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 172 [2022-12-14 10:53:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:14,262 INFO L225 Difference]: With dead ends: 104871 [2022-12-14 10:53:14,262 INFO L226 Difference]: Without dead ends: 53731 [2022-12-14 10:53:14,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:53:14,423 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 209 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:14,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1548 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:53:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53731 states. [2022-12-14 10:53:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53731 to 53731. [2022-12-14 10:53:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53731 states, 39821 states have (on average 1.6076190954521483) internal successors, (64017), 41865 states have internal predecessors, (64017), 10249 states have call successors, (10249), 2691 states have call predecessors, (10249), 3660 states have return successors, (24345), 9669 states have call predecessors, (24345), 10244 states have call successors, (24345) [2022-12-14 10:53:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53731 states to 53731 states and 98611 transitions. [2022-12-14 10:53:17,769 INFO L78 Accepts]: Start accepts. Automaton has 53731 states and 98611 transitions. Word has length 172 [2022-12-14 10:53:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:17,770 INFO L495 AbstractCegarLoop]: Abstraction has 53731 states and 98611 transitions. [2022-12-14 10:53:17,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:53:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 53731 states and 98611 transitions. [2022-12-14 10:53:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-12-14 10:53:17,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:17,776 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:17,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:53:17,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:17,978 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:17,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:17,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1423384587, now seen corresponding path program 1 times [2022-12-14 10:53:17,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:17,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298834409] [2022-12-14 10:53:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:17,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 10:53:18,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:18,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298834409] [2022-12-14 10:53:18,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298834409] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:53:18,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997133392] [2022-12-14 10:53:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:18,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:53:18,125 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:53:18,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:53:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:18,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:53:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:53:18,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:18,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997133392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:18,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:53:18,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 10:53:18,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695394838] [2022-12-14 10:53:18,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:18,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:53:18,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:18,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:53:18,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:53:18,465 INFO L87 Difference]: Start difference. First operand 53731 states and 98611 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:53:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:21,488 INFO L93 Difference]: Finished difference Result 110019 states and 211163 transitions. [2022-12-14 10:53:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:53:21,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 175 [2022-12-14 10:53:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:21,742 INFO L225 Difference]: With dead ends: 110019 [2022-12-14 10:53:21,742 INFO L226 Difference]: Without dead ends: 56305 [2022-12-14 10:53:22,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:53:22,045 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 207 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:22,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1548 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:53:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56305 states. [2022-12-14 10:53:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56305 to 56305. [2022-12-14 10:53:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56305 states, 42329 states have (on average 1.6261900824493847) internal successors, (68835), 44373 states have internal predecessors, (68835), 10249 states have call successors, (10249), 2757 states have call predecessors, (10249), 3726 states have return successors, (24345), 9669 states have call predecessors, (24345), 10244 states have call successors, (24345) [2022-12-14 10:53:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56305 states to 56305 states and 103429 transitions. [2022-12-14 10:53:25,288 INFO L78 Accepts]: Start accepts. Automaton has 56305 states and 103429 transitions. Word has length 175 [2022-12-14 10:53:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:25,289 INFO L495 AbstractCegarLoop]: Abstraction has 56305 states and 103429 transitions. [2022-12-14 10:53:25,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:53:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 56305 states and 103429 transitions. [2022-12-14 10:53:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 10:53:25,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:25,295 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:25,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:53:25,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 10:53:25,498 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:25,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1146055579, now seen corresponding path program 1 times [2022-12-14 10:53:25,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:25,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872175765] [2022-12-14 10:53:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:25,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 10:53:25,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:25,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872175765] [2022-12-14 10:53:25,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872175765] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:25,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:53:25,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:53:25,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846415218] [2022-12-14 10:53:25,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:25,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:53:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:53:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:53:25,658 INFO L87 Difference]: Start difference. First operand 56305 states and 103429 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:53:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:28,755 INFO L93 Difference]: Finished difference Result 115365 states and 221192 transitions. [2022-12-14 10:53:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:53:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 177 [2022-12-14 10:53:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:28,967 INFO L225 Difference]: With dead ends: 115365 [2022-12-14 10:53:28,967 INFO L226 Difference]: Without dead ends: 58549 [2022-12-14 10:53:29,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:53:29,139 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 99 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:29,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1561 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:53:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58549 states. [2022-12-14 10:53:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58549 to 58549. [2022-12-14 10:53:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58549 states, 44507 states have (on average 1.5733030759206417) internal successors, (70023), 46551 states have internal predecessors, (70023), 10249 states have call successors, (10249), 2823 states have call predecessors, (10249), 3792 states have return successors, (24345), 9669 states have call predecessors, (24345), 10244 states have call successors, (24345) [2022-12-14 10:53:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58549 states to 58549 states and 104617 transitions. [2022-12-14 10:53:32,569 INFO L78 Accepts]: Start accepts. Automaton has 58549 states and 104617 transitions. Word has length 177 [2022-12-14 10:53:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:32,569 INFO L495 AbstractCegarLoop]: Abstraction has 58549 states and 104617 transitions. [2022-12-14 10:53:32,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 10:53:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 58549 states and 104617 transitions. [2022-12-14 10:53:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 10:53:32,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:32,578 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:32,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 10:53:32,579 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:32,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:32,579 INFO L85 PathProgramCache]: Analyzing trace with hash 279230730, now seen corresponding path program 1 times [2022-12-14 10:53:32,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:32,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583987088] [2022-12-14 10:53:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:32,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 10:53:32,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:32,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583987088] [2022-12-14 10:53:32,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583987088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:32,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:53:32,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:53:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119730403] [2022-12-14 10:53:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:32,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:53:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:32,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:53:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:53:32,843 INFO L87 Difference]: Start difference. First operand 58549 states and 104617 transitions. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 6 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 10:53:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:39,597 INFO L93 Difference]: Finished difference Result 144089 states and 272088 transitions. [2022-12-14 10:53:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:53:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 6 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) Word has length 177 [2022-12-14 10:53:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:39,888 INFO L225 Difference]: With dead ends: 144089 [2022-12-14 10:53:39,888 INFO L226 Difference]: Without dead ends: 79484 [2022-12-14 10:53:40,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:53:40,089 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 1707 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 3988 mSolverCounterSat, 795 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 4783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 795 IncrementalHoareTripleChecker+Valid, 3988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:40,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1761 Valid, 1955 Invalid, 4783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [795 Valid, 3988 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 10:53:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79484 states. [2022-12-14 10:53:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79484 to 74093. [2022-12-14 10:53:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74093 states, 54747 states have (on average 1.5083200905985716) internal successors, (82576), 57493 states have internal predecessors, (82576), 13835 states have call successors, (13835), 4244 states have call predecessors, (13835), 5510 states have return successors, (29777), 12860 states have call predecessors, (29777), 13830 states have call successors, (29777) [2022-12-14 10:53:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74093 states to 74093 states and 126188 transitions. [2022-12-14 10:53:45,262 INFO L78 Accepts]: Start accepts. Automaton has 74093 states and 126188 transitions. Word has length 177 [2022-12-14 10:53:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:45,263 INFO L495 AbstractCegarLoop]: Abstraction has 74093 states and 126188 transitions. [2022-12-14 10:53:45,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 6 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 10:53:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 74093 states and 126188 transitions. [2022-12-14 10:53:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 10:53:45,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:45,273 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:45,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 10:53:45,273 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:45,273 INFO L85 PathProgramCache]: Analyzing trace with hash -813471893, now seen corresponding path program 1 times [2022-12-14 10:53:45,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:45,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578497240] [2022-12-14 10:53:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:45,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 10:53:45,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:45,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578497240] [2022-12-14 10:53:45,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578497240] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:45,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:53:45,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:53:45,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682717058] [2022-12-14 10:53:45,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:45,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:53:45,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:45,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:53:45,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:53:45,640 INFO L87 Difference]: Start difference. First operand 74093 states and 126188 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 5 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 10:53:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:53,079 INFO L93 Difference]: Finished difference Result 165535 states and 288969 transitions. [2022-12-14 10:53:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:53:53,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 5 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) Word has length 178 [2022-12-14 10:53:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:53,402 INFO L225 Difference]: With dead ends: 165535 [2022-12-14 10:53:53,402 INFO L226 Difference]: Without dead ends: 91459 [2022-12-14 10:53:53,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:53:53,663 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 1219 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 4242 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 4789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 4242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:53,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1295 Valid, 1471 Invalid, 4789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 4242 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 10:53:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91459 states. [2022-12-14 10:53:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91459 to 85146. [2022-12-14 10:53:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85146 states, 65159 states have (on average 1.5244095213247595) internal successors, (99329), 68193 states have internal predecessors, (99329), 13961 states have call successors, (13961), 4452 states have call predecessors, (13961), 6025 states have return successors, (24145), 13046 states have call predecessors, (24145), 13956 states have call successors, (24145) [2022-12-14 10:53:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85146 states to 85146 states and 137435 transitions. [2022-12-14 10:53:58,682 INFO L78 Accepts]: Start accepts. Automaton has 85146 states and 137435 transitions. Word has length 178 [2022-12-14 10:53:58,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:58,683 INFO L495 AbstractCegarLoop]: Abstraction has 85146 states and 137435 transitions. [2022-12-14 10:53:58,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 5 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 10:53:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 85146 states and 137435 transitions. [2022-12-14 10:53:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 10:53:58,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:58,689 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:58,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 10:53:58,689 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:53:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1051218808, now seen corresponding path program 1 times [2022-12-14 10:53:58,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:53:58,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942636517] [2022-12-14 10:53:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:58,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:53:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 10:53:59,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:53:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942636517] [2022-12-14 10:53:59,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942636517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:59,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:53:59,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:53:59,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916803931] [2022-12-14 10:53:59,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:59,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:53:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:53:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:53:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:53:59,145 INFO L87 Difference]: Start difference. First operand 85146 states and 137435 transitions. Second operand has 8 states, 5 states have (on average 19.4) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 10:54:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:06,244 INFO L93 Difference]: Finished difference Result 210026 states and 342784 transitions. [2022-12-14 10:54:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:54:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 19.4) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 180 [2022-12-14 10:54:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:06,758 INFO L225 Difference]: With dead ends: 210026 [2022-12-14 10:54:06,759 INFO L226 Difference]: Without dead ends: 127741 [2022-12-14 10:54:06,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:54:06,957 INFO L413 NwaCegarLoop]: 1125 mSDtfsCounter, 610 mSDsluCounter, 5572 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 6697 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:06,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 6697 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:54:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127741 states. [2022-12-14 10:54:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127741 to 127567. [2022-12-14 10:54:13,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127567 states, 97417 states have (on average 1.5226500508124865) internal successors, (148332), 101890 states have internal predecessors, (148332), 21206 states have call successors, (21206), 6628 states have call predecessors, (21206), 8943 states have return successors, (38128), 19888 states have call predecessors, (38128), 21201 states have call successors, (38128) [2022-12-14 10:54:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127567 states to 127567 states and 207666 transitions. [2022-12-14 10:54:14,325 INFO L78 Accepts]: Start accepts. Automaton has 127567 states and 207666 transitions. Word has length 180 [2022-12-14 10:54:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:14,325 INFO L495 AbstractCegarLoop]: Abstraction has 127567 states and 207666 transitions. [2022-12-14 10:54:14,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 19.4) internal successors, (97), 7 states have internal predecessors, (97), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2022-12-14 10:54:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 127567 states and 207666 transitions. [2022-12-14 10:54:14,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 10:54:14,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:14,332 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:14,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 10:54:14,332 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:14,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1704385223, now seen corresponding path program 1 times [2022-12-14 10:54:14,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:14,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883840518] [2022-12-14 10:54:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:14,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 10:54:15,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:15,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883840518] [2022-12-14 10:54:15,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883840518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:15,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219122977] [2022-12-14 10:54:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:15,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:15,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:15,438 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:15,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:54:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:15,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 2145 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:54:15,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-12-14 10:54:15,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:15,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219122977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:15,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:54:15,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 10:54:15,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003979011] [2022-12-14 10:54:15,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:54:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:54:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:54:15,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:54:15,755 INFO L87 Difference]: Start difference. First operand 127567 states and 207666 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2022-12-14 10:54:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:22,132 INFO L93 Difference]: Finished difference Result 130062 states and 223425 transitions. [2022-12-14 10:54:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:54:22,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 180 [2022-12-14 10:54:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:22,706 INFO L225 Difference]: With dead ends: 130062 [2022-12-14 10:54:22,706 INFO L226 Difference]: Without dead ends: 129905 [2022-12-14 10:54:22,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:54:22,756 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 47 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1826 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:22,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1826 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:54:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129905 states. [2022-12-14 10:54:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129905 to 127923. [2022-12-14 10:54:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127923 states, 97773 states have (on average 1.52074703650292) internal successors, (148688), 102246 states have internal predecessors, (148688), 21206 states have call successors, (21206), 6628 states have call predecessors, (21206), 8943 states have return successors, (38128), 19888 states have call predecessors, (38128), 21201 states have call successors, (38128) [2022-12-14 10:54:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127923 states to 127923 states and 208022 transitions. [2022-12-14 10:54:30,330 INFO L78 Accepts]: Start accepts. Automaton has 127923 states and 208022 transitions. Word has length 180 [2022-12-14 10:54:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:30,331 INFO L495 AbstractCegarLoop]: Abstraction has 127923 states and 208022 transitions. [2022-12-14 10:54:30,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2022-12-14 10:54:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 127923 states and 208022 transitions. [2022-12-14 10:54:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-12-14 10:54:30,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:30,338 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:30,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:54:30,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 10:54:30,541 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:54:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:30,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1152572913, now seen corresponding path program 1 times [2022-12-14 10:54:30,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:54:30,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20767792] [2022-12-14 10:54:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:54:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 1 proven. 160 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2022-12-14 10:54:33,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:54:33,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20767792] [2022-12-14 10:54:33,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20767792] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:54:33,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387414347] [2022-12-14 10:54:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:33,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:33,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:33,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:33,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:54:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:34,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 2954 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:54:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2022-12-14 10:54:34,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2022-12-14 10:54:35,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387414347] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:35,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591998700] [2022-12-14 10:54:35,133 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 10:54:35,133 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:54:35,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:54:35,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:54:35,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:54:40,181 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 598 for LOIs [2022-12-14 10:54:45,848 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 598 for LOIs [2022-12-14 10:55:31,011 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 596 for LOIs [2022-12-14 10:56:10,951 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 453 for LOIs [2022-12-14 10:56:11,861 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 105 for LOIs [2022-12-14 10:56:12,131 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 525 for LOIs [2022-12-14 10:56:12,477 INFO L197 IcfgInterpreter]: Interpreting procedure enterElevator with input of size 449 for LOIs [2022-12-14 10:56:13,411 INFO L197 IcfgInterpreter]: Interpreting procedure pressInLiftFloorButton with input of size 471 for LOIs [2022-12-14 10:56:13,577 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 446 for LOIs [2022-12-14 10:56:13,874 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 589 for LOIs [2022-12-14 10:56:17,575 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 593 for LOIs [2022-12-14 10:56:18,189 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 421 for LOIs [2022-12-14 10:56:18,261 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 435 for LOIs [2022-12-14 10:56:18,370 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 451 for LOIs [2022-12-14 10:56:18,487 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 521 for LOIs [2022-12-14 10:56:18,645 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull with input of size 453 for LOIs [2022-12-14 10:56:19,943 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 37 for LOIs [2022-12-14 10:56:19,952 INFO L197 IcfgInterpreter]: Interpreting procedure removePersonFromFloor with input of size 562 for LOIs [2022-12-14 10:56:22,590 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 74 for LOIs [2022-12-14 10:56:22,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:03,472 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 529 DAG size of output: 463 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:58:43,722 WARN L233 SmtUtils]: Spent 8.32s on a formula simplification. DAG size of input: 765 DAG size of output: 643 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:01:09,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1591998700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:01:09,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:01:09,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [38, 5, 7] total 142 [2022-12-14 11:01:09,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427066424] [2022-12-14 11:01:09,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:01:09,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 11:01:09,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:01:09,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 11:01:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=975, Invalid=19047, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 11:01:09,410 INFO L87 Difference]: Start difference. First operand 127923 states and 208022 transitions. Second operand has 97 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 65 states have internal predecessors, (103), 28 states have call successors, (30), 18 states have call predecessors, (30), 19 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-12-14 11:03:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:03:43,920 INFO L93 Difference]: Finished difference Result 256365 states and 416814 transitions. [2022-12-14 11:03:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 11:03:43,921 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 65 states have internal predecessors, (103), 28 states have call successors, (30), 18 states have call predecessors, (30), 19 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) Word has length 306 [2022-12-14 11:03:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:03:44,420 INFO L225 Difference]: With dead ends: 256365 [2022-12-14 11:03:44,420 INFO L226 Difference]: Without dead ends: 128458 [2022-12-14 11:03:44,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 772 SyntacticMatches, 47 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10021 ImplicationChecksByTransitivity, 374.5s TimeCoverageRelationStatistics Valid=1382, Invalid=26008, Unknown=0, NotChecked=0, Total=27390 [2022-12-14 11:03:44,799 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 824 mSDsluCounter, 8187 mSDsCounter, 0 mSdLazyCounter, 18988 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 8754 SdHoareTripleChecker+Invalid, 19397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 18988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:03:44,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 8754 Invalid, 19397 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [409 Valid, 18988 Invalid, 0 Unknown, 0 Unchecked, 60.0s Time] [2022-12-14 11:03:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128458 states. [2022-12-14 11:03:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128458 to 128305. [2022-12-14 11:03:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128305 states, 98049 states have (on average 1.5202092831135452) internal successors, (149055), 102535 states have internal predecessors, (149055), 21277 states have call successors, (21277), 6663 states have call predecessors, (21277), 8978 states have return successors, (38209), 19952 states have call predecessors, (38209), 21272 states have call successors, (38209) [2022-12-14 11:03:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128305 states to 128305 states and 208541 transitions. [2022-12-14 11:03:52,876 INFO L78 Accepts]: Start accepts. Automaton has 128305 states and 208541 transitions. Word has length 306 [2022-12-14 11:03:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:03:52,877 INFO L495 AbstractCegarLoop]: Abstraction has 128305 states and 208541 transitions. [2022-12-14 11:03:52,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 65 states have internal predecessors, (103), 28 states have call successors, (30), 18 states have call predecessors, (30), 19 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-12-14 11:03:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 128305 states and 208541 transitions. [2022-12-14 11:03:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-12-14 11:03:52,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:03:52,885 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:03:52,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:03:53,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:03:53,087 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:03:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:03:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash 587857807, now seen corresponding path program 1 times [2022-12-14 11:03:53,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:03:53,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774608797] [2022-12-14 11:03:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:53,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:03:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-12-14 11:03:54,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:03:54,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774608797] [2022-12-14 11:03:54,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774608797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:03:54,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415664469] [2022-12-14 11:03:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:54,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:03:54,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:03:54,290 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:03:54,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9785d1db-aa62-4b3d-a05e-8de026552031/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:03:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 11:03:54,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:03:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-12-14 11:03:55,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:03:57,203 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 11:04:03,081 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 11:04:03,371 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 11:04:09,249 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 11:04:09,341 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time...